Magnon-mediated quantum battery under systematic errors
- URL: http://arxiv.org/abs/2105.08387v2
- Date: Mon, 13 Sep 2021 06:10:21 GMT
- Title: Magnon-mediated quantum battery under systematic errors
- Authors: Shi-fan Qi, Jun Jing
- Abstract summary: We propose a quantum charging protocol in which both battery and charger are consists of a many-spin system.
We find that the spin-spin couplings insider both battery and charger can be used to promote the charging performance.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Quantum battery is one of the most prominent micro-devices in the
rapid-developing quantum thermodynamics. We propose a quantum charging protocol
in which both battery and charger are consisted of a many-spin system. The
battery and charger are connected via the Kittle mode of the magnon system,
that serves as a charging wire and then enables a long-range charging protocol.
Counter-intuitively, we find that the spin-spin couplings insider both battery
and charger can be used to promote the charging performance in comparison to
the noninteracting condition. And a remarkable promotion is realized at a
"sweet" spot in terms of the average coupling strength. Moreover, we apply the
quantum-state-diffusion equation to test the robustness of our magnon-mediated
charging protocol to the systematic errors about the magnon frequency.
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